Allows protonvpn-app to start minimized

[hsiurebgjk]

Addresses: https://protonmail.uservoice.com/forums/932836-proton-vpn/suggestions/45290605-start-protonvpn-minimized-in-tray-linux

Adds two command line options to protonvpn-app:

• --start-minimized
• --version

protonvpn-app --help
Usage:
  protonvpn-app [OPTION…]

Help Options:
  -h, --help                 Show help options
  --help-all                 Show all help options
  --help-gapplication        Show GApplication options
  --help-gtk                 Show GTK+ Options

Application Options:
  --start-minimized          Start minimized in the system tray
  -v, --version              Display the application's version
  --display=DISPLAY          X display to use

Example output with --version

protonvpn-app --version
4.3.2

echo "Exit status: $?"
Exit status: 0

protonvpn-app -v
4.3.2

To start Proton VPN minimized:

protonvpn-app --start-minimized

[calexandru2018]

Hey @hsiurebgjk , appreciate you making this MR. We'll take a closer look at your MR and comeback later at it. Thank you 👍🏻

[calexandru2018]

Heu @hsiurebgjk sorry for the delay but just wanted to let you know that we've merged this internally and should be released next week to beta, following the week after the next one it should be released to stable and thus on github. I'll close the ticket once the code is published on github, thanks a lot for your contribution! 👍🏻